diff --git a/linucb/views/collect_data.py b/linucb/views/collect_data.py
index f6ca7b91fb9d15d1bbb3d27fe2688ab81476ffa6..052e455f874c461e1121fb521c90c38bbb9fd981 100644
--- a/linucb/views/collect_data.py
+++ b/linucb/views/collect_data.py
@@ -78,7 +78,7 @@ class CollectData(object):
                     recommend_topic_id_list_click = ESPerform.get_tag_topic_list(click_topic_tag_list,
                                                                                  have_read_topic_id_list)
                 if len(recommend_topic_id_list_click) > 0:
-                    num = min(len(recommend_topic_id_list), 2)
+                    num = min(len(recommend_topic_id_list_click), 2)
                     recommend_topic_id_list.extend(recommend_topic_id_list_click[0:num])
 
                 tag_id_list = recommend_tag_list[0:100]